the internet who have developed the desire or the will to undertake attacks. they are difficult to find. co-conspirators and others can join in. but then again, the internet can facilitate that kind of meeting or coming together for that kind of attack. it is lone wolves that we are principally concerned about. the other point in terms of keeping me awake is cyber. and the fact that what is happening in the cyber arena cuts across any of our disciplines, whether it's counterintelligence or countered and -- counter terrorists as well as criminal. there are various objectives and goals of discrete individuals utilizing the cyber arena, whether it be for criminal purposes or for terrorist purposes that has grown to be right up there with aqap with homegrown terrorists and cyber attackers. >> thank you. senator rockefeller, are you ok? >> i think i'm ok. i have a couple of questions i would like to ask, but i would like to get to the closure. >> i know you have a fustian. >> just one, madam chair. on the surveillance front, i hope we can do this with just a yes or no answer and i know senator feinstein wants to move on. last year, the nsa director was at a conference and he was asked about the nsa surveillance of america. he replied, "the story that we have millions or hundreds of millions dossiers on people is completely false." having served on the committee now for a dozen years, i don't really know what a dossier is in this context. so what i wanted to see, if you could give me a yes or no answer to the question, does the nsa collect any type of data at all on millions or hundreds of millions of americans? >> no, sir. >> it does not? >> not wittingly. there are cases where they could inadvertently perhaps collect but not willingly.